Granted Patent B2

US 7,143,778 · App. 11/040,511 · Granted Dec 5, 2006

Abstract

Claims (38)

1. A feeder device for introducing one or more chemicals to a fluid comprising:

a housing having an inlet through which the fluid flows into the feeder device at an inlet flow rate and an outlet through which the fluid flows out of the feeder device at an outlet flow rate;

a hopper having sidewalls and at least an open bottom, said hopper defining a top portion of said housing;

a grid at least partially closing said open bottom, said grid having a top surface and a bottom surface, said grid and said hopper adapted to hold the one or more chemicals so that the one or more chemicals are supported by said top surface and are contained by said hopper sidewalls;

a dissolving cup at least partially containing said hopper and said bottom surface of said grid, said dissolving cup having a bottom surface and sidewalls joined thereto, said sidewalls extending upwardly above said top surface of said grid, said bottom surface including a center nozzle in fluid communication with said inlet and oriented vertically toward said grid, said bottom surface positioned a predetermined distance from said top surface of said grid, said sidewalls having an opening formed therein, said opening having a predetermined cross-sectional area;

a spout fluidly connected with said opening, said spout defining a horizontal channel having channel walls and a channel floor, said channel floor positioned a predetermined distance above said bottom surface of said dissolving cup; and

an outlet chamber in fluid communication with said spout and said outlet, said outlet chamber defining a bottom portion of said housing.

2. A feeder device according to claim 1 , wherein said dissolving cup is adapted to at least temporarily contain the fluid and said inlet flow rate is selected so as to create a raised-center wave portion within the fluid contained by said dissolving cup.

3. A feeder device according to claim 2 , wherein a portion of said raised-center wave portion enters said hopper at least at said top surface of said grid, said portion of said raised-center wave portion defined by a circular cross-sectional area and a height, said circular cross-sectional area having a diameter, said diameter and said height both varying according to said inlet flow rate.

4. A feeder device according to claim 1 , wherein said bottom surface includes an off-center nozzle in fluid communication with said inlet and adapted to direct the fluid horizontally in said dissolving cup.

5. A feeder device according to claim 1 , wherein said outlet chamber includes substantially vertical sidewalls.

6. A feeder device according to claim 1 , wherein the device is not pressurized.

7. A feeder device according to claim 3 , wherein when said inlet flow rate is about 0.3 gallons per minute, said diameter is about 0.625 inch.

8. A feeder device according to claim 3 , wherein when said inlet flow rate is about 0.4 gallons per minute, said diameter is about 1.0 inch.

9. A feeder device according to claim 3 , wherein when said inlet flow rate is about 0.5 gallons per minute, said diameter is about 1.25 inches.

10. A feeder device according to claim 3 , wherein when said inlet flow rate is about 0.6 gallons per minute, said diameter is about 1.45 inches.

11. A feeder device according to claim 3 , wherein when said inlet flow rate is about 0.7 gallons per minute, said diameter is about 1.75 inches.

12. A feeder device according to claim 3 , wherein when said inlet flow rate is about 0.8 gallons per minute, said diameter is about 2.25 inches.

13. A feeder device according to claim 3 , wherein when said inlet flow rate is about 0.9 gallons per minute, said diameter is about 2.5 inches.

14. A feeder device according to claim 3 , wherein when said inlet flow rate is about 1.0 gallons per minute, said diameter is about 2.75 inches.

15. A feeder device according to claim 1 , further comprising means for varying the amount of the one or more chemicals contacted by the fluid.

16. A feeder device according to claim 1 , further comprising means for temporarily containing the fluid and creating a raised-center wave portion within the fluid, wherein said raised-center wave portion enters a portion of said hopper at least at said top surface of said grid, said portion of said hopper defined by a circular cross-sectional area and a height, said circular cross-sectional area having a diameter.

17. A feeder device according to claim 16 , further comprising means for varying said circular cross-sectional area and said height according to said inlet flow rate.

18. A feeder device according to claim 1 , further comprising means for mixing the fluid and the one or more chemicals within said dissolving cup.

19. A feeder device according to claim 1 , further comprising means for preventing the one or more chemicals from attaching to said outlet chamber.

20. A method of introducing one or more chemicals to a fluid comprising the steps of:

providing a feeder device according to claim 1 ;

introducing fluid to the feeder device at an inlet flow rate;

bringing a portion of the fluid in contact with a portion of the one or more chemicals, said portion of the fluid defined by a circular cross-sectional area and a height, said circular cross-sectional area having a diameter; and

varying said diameter and said height according to said inlet flow rate.

21. A method according to claim 20 , further comprising the step of mixing the fluid and the one or more chemicals.

22. A feeder device for introducing one or more chemicals to a fluid comprising:

a housing having an inlet through which the fluid flows into the feeder device at an inlet flow rate and an outlet through which the fluid flows out of the feeder device at an outlet flow rate;

a hopper having sidewalls and at least an open bottom, said hopper defining a top portion of said housing;

a grid at least partially closing said open bottom, said grid having a top surface and a bottom surface, said grid and said hopper adapted to hold the one or more chemicals so that the one or more chemicals are supported by said top surface and are contained by said hopper sidewalls;

a dissolving cup at least partially containing said hopper and said bottom surface of said grid, said dissolving cup having a bottom surface and sidewalls joined thereto, said sidewalls extending upwardly above said top surface of said grid, said bottom surface including a center nozzle in fluid communication with said inlet and oriented vertically toward said grid, said bottom surface positioned a predetermined distance from said top surface of said grid, said sidewalls having an opening formed therein, said opening having a predetermined cross-sectional area, wherein said dissolving cup is adapted to at least temporarily contain the fluid and said inlet flow rate is selected so as to create a raised-center wave portion within the fluid contained by said dissolving cup, a portion of said raised-center wave portion entering a said hopper at least at said top surface of said grid, said portion of said raised-center wave portion being defined by a circular cross-sectional area and a height, said circular cross-sectional area having a diameter, said diameter and said height both varying according to said inlet flow rate;

a spout fluidly connected with said opening, said spout defining a horizontal channel having channel walls and a channel floor, said channel floor positioned a predetermined distance above said bottom surface of said dissolving cup; and

an outlet chamber joined with said hopper and in fluid communication with said spout and said outlet, said outlet chamber defining a bottom portion of said housing.

Assignments (13)